I'm not seeing this ATM, using the non-Google Apps Gmail interface from the U.S. (and sending, as it happens, to a "foreign" address). Can anyone provide addit

I'm not seeing this ATM, using the non-Google Apps Gmail interface from the U.S. (and sending, as it happens, to a "foreign" address). Can anyone provide additional input into whether and when the Gmail web interface may be (and when not) inserting this header? Perhaps it's just in the Google Apps context?